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此摘要是机器生成的。

研究人员开发了一种新型的纳米诱导器,可以将与瘤相关的巨细胞 (TAM) 从支持瘤的M2状态重编程为抗瘤的M1状态. 这种策略增强了抗瘤免疫力,并允许在体内监测巨细胞再极化.

关键词:
在NIR-II窗口的窗口.进行比度成像成像.瘤微环境是一个微环境.与瘤相关的巨细胞重编程.

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科学领域:

  • 生物医学工程 生物医学工程
  • 癌症研究 癌症研究
  • 免疫学 免疫学 免疫学

背景情况:

  • 与瘤相关的巨细胞 (TAMs) 在瘤微环境 (TME) 中至关重要,经常表现出一种M2型的表型,促进瘤进展.
  • 将TAM重新编程为一种抗瘤表型,特别是M1型,是关键的治疗目标.

研究的目的:

  • 开发和评估一种可通过氧化 (NO) 激活的近红外II (NIR-II) 纳米诱导器 (I/E@M2pep),用于选择性M2型TAM准和再极化.
  • 为了使在体内可视化使用NIR-II光/光声成像的TAM再极化.

主要方法:

  • I/E@M2pep的设计包括M2pep用于定位,IPI549用于M1再极化和NO生产,以及一个NO可激活的NIR-II探针 (ETNO).
  • 在小鼠乳腺癌模型中静脉注射I/E@M2pep.
  • 通过比度NIR-II光声信号评估M2到M1的再极化.
  • 用CD47单克隆抗体进行组合治疗.

主要成果:

  • I/E@M2pep成功地准了类似M2的TAM,并诱导了M2到M1的再极化,由NIR-II光声信号变化证明.
  • 纳米诱导器在体内促进了TAMs的同时可视化和重编程.
  • 与抗CD47的联合治疗显著增强了抗瘤免疫力和TME重塑.

结论:

  • 开发的纳米诱导器提供了一个双重功能,即在体内促进和可视化TAM再极化.
  • 这种方法对通过调节TME和增强抗瘤免疫力来推进癌症治疗具有重大前景.
  • 该策略可以广泛应用于研究瘤发病,转移和治疗反应.